Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Preferred stock, par value (in usd per share)	$ 0.0000001	$ 0.0000001
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares outstanding	0	0
Preferred stock, shares issued	0	0
Common stock, par value (in usd per share)	$ 0.0000001	$ 0.0000001
Common stock, shares authorized	350,000,000	350,000,000
Common stock, shares outstanding	94,261,414	85,832,454
Common stock, shares issued	94,261,414	85,832,454
Variable interest entity, assets	$ 45.1	$ 48.3
Variable interest entity, liabilities	$ 5.7	$ 1.2